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    <script>
        // 使用for循环 - 求出数组里大于5的i和[4, 9, 5, 20, 3, 11]
        let arr = [4, 9, 5, 20, 3, 11]
        let sum = 0
        for (let i = 0; i < arr.length; i++) {
            if (arr[i] > 5) {
                sum += arr[i]
            }
        }
        console.log(sum);
    </script>
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